Llanowar Stalker
{G}
Creature — Elf Warrior
Oracle Text
Whenever another creature you control enters, this creature gets +1/+0 until end of turn.
Watch Out
ETB trigger, not a cast triggerRules Note
This card's ability triggers when it enters the battlefield, not when it's cast. Effects that double ETB triggers (like Panharmonicon) work here. Countering the spell prevents the creature from entering, so the ETB won't fire.